@article{AA_1996_8_3_a8,
     author = {Yu. R. Romanovskii},
     title = {Limit cycles and complex geometry},
     journal = {Algebra i analiz},
     pages = {184--195},
     year = {1996},
     volume = {8},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1996_8_3_a8/}
}